The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 16, 2008
Filed:
Mar. 30, 2007
Applicant:
Yoshinori Maegawa, Obu, JP;
Inventor:
Yoshinori Maegawa, Obu, JP;
Assignee:
Denso Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M 33/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is provided an air-fuel ratio control apparatus of an internal combustion engine capable of learning an air-fuel ratio and performing purge at the same time. When purge is being performed, in an air-fuel ratio learning routine, an air-fuel ratio deviation between an air-fuel ratio detected by an air-fuel ratio sensor and a target air-fuel ratio is computed by the use of a fuel vapor concentration detected in a concentration detection routine and then a learning correction value flaf to correct the computed air-fuel ratio deviation is computed.